During one of the longest political trials of English history thousands of badges were sold with "I'm in the Angry Brigade".

They called it the Angry Brigade trial. It was the top priority hunt, with the so-called crack squad of 25 detectives, 50% Special Branch, that planted guns, explosives and detonators at 359 Amhurst Road in August 1971 in a desperate attempt to stop the Angry Brigade from destroying the sacred property of the ruling class.
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"With the Angry Brigade (I was technically guilty of the Conspiracy charge but as I’ve said before, they framed a guilty man), it was from a background also of hostility to the elitism of the then vanguard left that saw itself as an alternative ruling class." ... John Barker